/*
* OpenI2CRADIO
* I2C Handler
- * (C) 2013-06-10 K.Ohta <whatisthis.sowhat ai gmail.com>
- * License: GPL2
+ * Copyright (C) 2013-06-10 K.Ohta <whatisthis.sowhat ai gmail.com>
+ * License: GPL2+LE
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ * This library / program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library; see the file COPYING. If not, write to the
+ * Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ * As a special exception, if you link this(includeed from sdcc) library
+ * with other files, some of which are compiled with SDCC,
+ * to produce an executable, this library does not by itself cause
+ * the resulting executable to be covered by the GNU General Public License.
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
*/
#include <stdarg.h>
#include <stdio.h>
+#ifdef __SDCC
+#include <delay.h>
+#include <pic18fregs.h>
+#endif
#include "i2c_io.h"
+
+
+#ifdef _I2C_IO_TWO_MSSPS
+void i2c1_init(void)
+{
+ unsigned char b;
+// b = SSP1CON1;
+ b = _SSPEN | _SSPM3;
+ SSP1CON1 = b;
+ SSP1ADD = 19; // Fosc:8000[KHz] / (4 * I2C:Clock:100[KHz]) - 1
+ PIR1bits.SSPIF = 0;
+ PIE1bits.SSPIE = 0;
+ IPR1bits.SSPIP = 1;
+}
+void i2c2_init(void)
+{
+ unsigned char b;
+ b = _SSPEN | _SSPM3;
+ SSP2CON1 = b;
+ SSP2ADD = 4; // Fosc:8000[KHz] / (4 * I2C:Clock:400[KHz]) - 1
+}
+#else
+ #ifdef _I2C_IO_ONE_MSSP
+void i2c1_init(void)
+{
+ // unsigned char b;
+// b = _SSPEN | _SSPM3;
+ // SSPCON1bits.SSPEN = 1;
+// SSPCON1bits.SSPM3 = 1;
+// SSPADD = 4; // Fosc:8000[KHz] / (4 * I2C:Clock:400[KHz]) - 1
+// SSPSTAT = 0x80;
+ PIR1bits.SSPIF = 0;
+ PIE1bits.SSPIE = 0;
+ IPR1bits.SSPIP = 1;
+}
+void i2c2_init(void)
+{
+ i2c1_init();
+}
+
+ #else // None MSSP, Software I2C
+void i2c1_init(void)
+{
+}
+void i2c2_init(void)
+{
+}
+ #endif
+// I2C_IO
+void i2c_send_byte(unsigned char addr, unsigned char reg, unsigned char data)
+{
+#ifdef __SDCC
+ i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
+ I2C_START();
+ i2c_writechar(addr);
+ i2c_writechar(reg);
+ i2c_writechar(data);
+ I2C_STOP();
+ i2c_close();
+// delay100tcy(2);
+#else
+ OpenI2C(MASTER, SLEW_ON);
+ SSPADD = 0x5;
+// IdleI2C();
+ StartI2C();
+ while (SSPCON2bits.SEN);
+ WriteI2C(addr);
+ while(SSPCON2bits.SEN);
+ WriteI2C(reg);
+ while(SSPCON2bits.SEN);
+ WriteI2C(data);
+ StopI2C();
+ while (SSPCON2bits.PEN);
+ CloseI2C();
+#endif // i2c_idle();
+}
+
+unsigned char i2c_read_byte(unsigned char addr, unsigned char reg)
+{
+ unsigned char c;
+ #ifdef __SDCC
+ i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
+ I2C_START();
+ i2c_writechar(addr);
+ i2c_writechar(reg);
+ I2C_STOP();
+ i2c_idle();
+// delay100tcy(2);
+ I2C_START();
+ i2c_writechar(addr | 1);
+ c = i2c_readchar();
+ I2C_ACK();
+ I2C_STOP();
+ i2c_close();
+#else
+ OpenI2C(MASTER, SLEW_ON);
+ SSPADD = 0x5;
+ StartI2C();
+ while(SSPCON2bits.SEN);
+ WriteI2C(addr);
+ // delay1ktcy(8);
+ while(SSPCON2bits.SEN);
+ WriteI2C(reg);
+ // delay1ktcy(8);
+ StopI2C();
+ IdleI2C();
+ StartI2C();
+ WriteI2C(addr | 1);
+ if (!SSPCON2bits.ACKSTAT){
+ SSPCON2bits.RCEN = 1;
+ while(SSPCON2bits.RCEN);
+ NotAckI2C();
+ while (SSPCON2bits.ACKEN);
+ StopI2C();
+ while (SSPCON2bits.PEN);
+ }
+ c = SSPBUF;
+ // delay1ktcy(8);
+ // delay1ktcy(8);
+ CloseI2C();
+#endif
+ // CLOSEASMASTER();
+ return c;
+
+}
+
+#endif
\ No newline at end of file
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